Alaska earthquakes

M3.4 earthquake 236 km SE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 236 km SE of Chiniak, Alaska on Wed, May 16, 2018, 10:34 PM AKDT (06:34 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M3.8 262 km SE of Chiniak, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.4 (mb), minor
Local time: Wed, May 16, 2018, 10:34 PM AKDT
UTC: 2018-05-17 06:34:49 UTC
Depth: 22.2 km (13.8 mi), shallow
Epicenter: 56.465° N, 149.002° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 8.2 km horizontally, 9.7 km in depth
Magnitude uncertainty: ±0.35
Depth from: From location
Station coverage gap: 190°, poorly surrounded by stations
Stations used: 135

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000e70t (also filed as ak19612558, ak0186aoejnu, aacse0186aoejnu). Read Tue, Sep 22, 2026, 2:38 PM UTC.